JPS56113161A - Electrophotographic method - Google Patents

Electrophotographic method

Info

Publication number
JPS56113161A
JPS56113161A JP1577180A JP1577180A JPS56113161A JP S56113161 A JPS56113161 A JP S56113161A JP 1577180 A JP1577180 A JP 1577180A JP 1577180 A JP1577180 A JP 1577180A JP S56113161 A JPS56113161 A JP S56113161A
Authority
JP
Japan
Prior art keywords
originals
images
photoreceptor
white color
potential
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP1577180A
Other languages
Japanese (ja)
Inventor
Hiroaki Tsuchiya
Shinichi Iwasaki
Ikuo Souma
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP1577180A priority Critical patent/JPS56113161A/en
Publication of JPS56113161A publication Critical patent/JPS56113161A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/02Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0266Arrangements for controlling the amount of charge
    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00Apparatus for electrographic processes using a charge pattern
    • G03G15/02Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices
    • G03G15/0291Apparatus for electrographic processes using a charge pattern for laying down a uniform charge, e.g. for sensitising; Corona discharge devices corona discharge devices, e.g. wires, pointed electrodes, means for cleaning the corona discharge device

Abstract

PURPOSE:To make high-quality copies in a short time irrespective of the kinds of originals by changing the potential curve from a black color original which is a reference on a photoreceptor up to a white color original according to the kinds of originals thereby determining the quantity of the 1st corona application at predetermined quantity. CONSTITUTION:At the time of exposing images to a photoreceptor by the coronas from a DC corona discharger 2 and the coronas from an AC corona discharger 3 then irradiating the entire surface with a lamp 4 thereby forming the latent images on the photoreceptor 1, a potential sensor 10 is disposed on the lower stream of the discharger 3, and the latent image potential in the state that the original lamp is held put out and the latent image potential corresponding to a white color original are measured. These measured values are fed back to a control part 11 which in turn changes the applied currents of the chargers 2, 3, so that the potentials of said black and white color originals conform to the predetermined potential curve. In this way, the influences owing to the varying densities of the images of the originals, the photographic fogs by the colors of the background, etc. are prevented and always sharp copies images are made obtainable from the 1st time.
JP1577180A 1980-02-12 1980-02-12 Electrophotographic method Pending JPS56113161A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1577180A JPS56113161A (en) 1980-02-12 1980-02-12 Electrophotographic method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1577180A JPS56113161A (en) 1980-02-12 1980-02-12 Electrophotographic method

Publications (1)

Publication Number Publication Date
JPS56113161A true JPS56113161A (en) 1981-09-05

Family

ID=11898060

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1577180A Pending JPS56113161A (en) 1980-02-12 1980-02-12 Electrophotographic method

Country Status (1)

Country Link
JP (1) JPS56113161A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6291967A (en) * 1985-10-18 1987-04-27 Fuji Xerox Co Ltd Controller for copying machine
JPS6294865A (en) * 1985-10-21 1987-05-01 Fuji Xerox Co Ltd Dark potential controller

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6291967A (en) * 1985-10-18 1987-04-27 Fuji Xerox Co Ltd Controller for copying machine
JPS6294865A (en) * 1985-10-21 1987-05-01 Fuji Xerox Co Ltd Dark potential controller

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